<template>
  <el-container class="home_container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏菜单区域 -->
      <el-aside :width="isCloopase ? '64px' : '200px'">
        <div class="toggle-btn" @click="toggleCollapse">|||</div>
        <el-menu
          default-active="2"
          class="el-menu-vertical-demo"
          background-color="#333744"
          text-color="#fff"
          active-text-color="#ffd04b"
          unique-opened
          :collapse="isCloopase"
          :collapse-transition="false"
          router
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu
            :index="item.id + ''"
            v-for="item in menuList"
            :key="item.id"
          >
            <!-- 一级菜单文本区域 -->
            <template slot="title">
              <i :class="iconsObj[item.id]"></i>
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/' + subItem.path"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavState('/' + subItem.path)"
            >
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容区 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menuList: [],
      iconsObj: {
        "125": "iconfont icon-users",
        "103": "iconfont icon-shangpinguanli",
        "101": "iconfont icon-suoyoushangpin",
        "102": "iconfont icon-danju-tianchong",
        "145": "iconfont icon-baobiao"
      },
      //是否折叠
      isCloopase: false,
      //激活的路径
      activePath: ""
    };
  },
  created() {
    this.getMenuList();
    this.activePath = window.sessionStorage.getItem("activePath");
  },
  methods: {
    logout() {
      //清除token
      window.sessionStorage.clear();
      //返回登录页面
      this.$router.push("/login");
    },
    // 获取所有菜单
    async getMenuList() {
      const { data: res } = await this.$http.get("menus");
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
      this.menuList = res.data;
    },
    // 点击按钮实现菜单折叠
    toggleCollapse() {
      this.isCloopase = !this.isCloopase;
    },
    //被激活的二级菜单地址
    saveNavState(activePath) {
      window.sessionStorage.setItem("activePath", activePath);
      this.activePath = activePath;
    }
  }
};
</script>
<style lang="less" scoped>
.home_container {
  height: 100%;
}
.el-header {
  background: #2a4d63;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #fff;
  font-size: 20px;
  padding-left: 0;
  > div {
    display: flex;
    align-items: center;
    > span {
      margin-left: 15px;
    }
  }
  > div > img {
    height: 50px;
    width: 50px;
  }
}
.el-aside {
  background: #333744;
  .el-menu {
    border-right: none;
  }
}
.iconfont {
  margin-right: 10px;
}
.el-main {
  background: #eee;
}
.toggle-btn {
  background: #555f7e;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2rem;
  cursor: pointer;
}
</style>
